/* ===================

AX2E (AXESCON XACML 2.0 Engine) is the Java authorization engine, which implements OASIS XACML 2.0 standard.
Copyright (C) 2007 AXESCON LLC

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA


Contact: AXESCON LLC - info{at}axescon.com

 =================== */
package axescon.xacml.model.explain;

import java.util.Iterator;

/**
 * @author argyn
 *         Date: Oct 17, 2005
 *         Time: 11:54:00 PM
 *         Responsibilities:
 */
public class Explainer {
    public static String getString(Explanation explanation) {
        if (explanation == null) return "no explanation was provided";
        String ret = "Explanation of the decision:\n";
        DecisionStep step = explanation.getStart();
        ret += getString(ret, step) + "The End.\n";
        return ret;
    }

    static String getString(String str, DecisionStep step) {
        if (step == null) return str;
        str += step.getSentence() + "\n";
        if (step.getChildren() == null) return str;
        Iterator it = step.getChildren().iterator();
        while (it.hasNext()) {
            DecisionStep nextStep = (DecisionStep) it.next();
            str += getString(str, nextStep) + "\n";
        }
        return str;
    }
}
